Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K15/00—Check valves
  • F16K15/14—Check valves with flexible valve members
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
  • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
  • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K15/00—Check valves
  • F16K15/14—Check valves with flexible valve members
  • F16K15/144—Check valves with flexible valve members the closure elements being fixed along all or a part of their periphery
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K15/00—Check valves
  • F16K15/14—Check valves with flexible valve members
  • F16K15/16—Check valves with flexible valve members with tongue-shaped laminae
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
  • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
  • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
  • F01L2001/34423—Details relating to the hydraulic feeding circuit
  • F01L2001/34426—Oil control valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
  • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
  • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
  • F01L2001/34423—Details relating to the hydraulic feeding circuit
  • F01L2001/34426—Oil control valves
  • F01L2001/3443—Solenoid driven oil control valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
  • F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
  • F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
  • F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
  • F01L2001/34423—Details relating to the hydraulic feeding circuit
  • F01L2001/34426—Oil control valves
  • F01L2001/34433—Location oil control valves
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/7722—Line condition change responsive valves
  • Y10T137/7837—Direct response valves [i.e., check valve type]
  • Y10T137/7879—Resilient material valve
  • Y10T137/7888—With valve member flexing about securement
  • Y10T137/7891—Flap or reed

Definitions

• the invention relates to a check valve and a hydraulic valve, in particular a control valve for controlling the pressure medium flows of a camshaft adjuster, with a built-in non-return valve.
• camshaft adjuster In modern internal combustion engines devices for variable adjustment of the timing of gas exchange valves, also known as camshaft adjuster are used to make the phase position of a camshaft relative to a crankshaft in a defined angular range, between a maximum early and a maximum late position variable.
• the cams of the camshafts are usually on cam followers, such as bucket tappets, finger levers or rocker arms. If a camshaft is rotated, the cams roll on the cam followers, which in turn actuate the gas exchange valves. Due to the position and the shape of the cams thus both the opening duration and the opening amplitude, but also the opening and closing times of the gas exchange valves are fixed.
• camshaft timing The angular displacement of the camshaft with respect to the crankshaft to achieve optimized timing for different speed and load conditions is referred to as camshaft timing.
• a constructive variant of a camshaft adjuster operates, for example, after the so-called Swivel motor principle.
• a stator and a rotor are provided, which are coaxial and are movable relative to each other.
• the stator and the rotor together form pairs of hydraulic chambers.
• a pair of chambers is here each bounded by webs of the stator and divided by a respective wing of the rotor into two mutually opposite pressure chambers whose volumes are changed in opposite directions by a relative rotational movement of the rotor to the stator.
• a hydraulic medium or pressure medium such as oil
• the pressure medium channels open on both sides of the respective wing, so that the hydraulic medium is guided into the respective pressure chamber.
• camshaft adjuster hydraulic control valves are used in the form of multi-way slide valves in the rule. They comprise, as essential components, a valve housing and a housing piston axially displaceably received control piston, which is actuated by an actuator, typically an electromagnet with plunger.
• control valves are connected as so-called central valves, which are used in a central bore of the rotor of a camshaft adjuster.
• the valve housing of such a central valve is provided with a thread, via which the valve housing can be screwed into a corresponding threaded bore of the camshaft to connect the rotor rotationally fixed to the camshaft.
• a supply or removal of pressure medium to the pressure medium connection or from the drain port of the control valve is effected by the rotor or the camshaft.
• the pressure medium is supplied radially via an inlet connection. About two working ports on the valve body, the pressure medium is alternately introduced into the opposite chambers of a chamber pair.
• a control valve with an integrated, flat check valve is described in DE 10 2008 004591.
• a hollow pressure medium insert is used, which is adapted in its outer diameter to the inner diameter of the housing.
• the pressure medium insert comprises a sleeve-shaped insert portion with a housing shaft side formed structural portion which is frontally provided with an axial support ring.
• the support ring is received within an axial retaining collar which is integrally formed on a seat surface body.
• the retaining collar is bent radially inwardly at its free end and engages behind the support ring, whereby the three components seat body, closing element and pressure medium insert are secured in their relative axial position.
• the plate-shaped closing element has a multiplicity of apertures which are designed in such a way that a central closure part, which is mounted resiliently over a plurality of spring tongues, is formed for closing a valve opening.
• the openings surround the closure part in a spiral shape.
• the invention has for its object to allow easy installation of a check valve in a small design at its place of use.
• a check valve comprising a sealing seat with a breakthrough and a resilient, flat closing element which covers the opening in a closed position, wherein the closing element and the sealing seat are firmly connected to each other and form a prefabricated unit.
• the invention is based on the consideration that a simple assembly of a two- or multi-part check valve is ensured by the individual parts of the check valve, which are in particular of different materials, are assembled before the use of the check valve to a prefabricated and in particular inseparable assembly. The result is the completion of a complete non-return valve, which is ready for use without additional components.
• the check valve is manufactured as a single unit and stored as such, transported and installed at its place of use. Thus, there is a simplified and convenient handling, so that the assembly cost is minimized. In particular, when the check valve has small components and / or a precise assembly of the components is required, the design of the check valve as a prefabricated unit of great advantage.
• the flat closure element which is in particular plate-shaped or disc-shaped, forms a spring element due to its geometry and its material composition.
• the spring element is supported against the sealing seat, wherein the spring element is fixedly connected at least one point with the sealing seat. If no external forces act on the check valve, this is in the closed position, in which the closing element rests on the sealing seat and thereby covers and closes the opening.
• a pressure medium which acts on the closing element from a certain direction, a free, unsecured area of the closing element is lifted from the sealing seat.
• the check valve is in an open position, in which the opening in the sealing seat is released and the pressure medium flows through the opening.
• the closing element comprises at least one bending web, at the end a closure plate for the opening and a fixing end for fixing the closing element are arranged on the sealing seat. Due to this special embodiment of the closing element, the resilient properties are imparted to it, so that it acts as a spring element.
• the closing element is fixed at the end on the bending web in the region of the fixing fixed to the sealing seat, so that the closure plate at the other end of the bending web pivotal movement between the closed position in which it covers the opening fluid-tight and the open position in which the breakthrough released is, can perform.
• the bending web acts as a lever that supports the pivoting movement of the closure plate at a comparatively low pressure force of the pressure medium.
• the fixing comprises at least one, in particular two fixing arms, over their entire length or only partially, eg in the area their ends are firmly connected to the sealing seat.
• the shape of the fixing arms is adapted to the cylindrical shape of the valve housing or to the outer contour of the disc-shaped sealing seat, so that the two fixing arms form a circular arc.
• the fixing also has a plurality of fixing arms. By enlarging the fixing in the manner of two or more fixing arms, a particularly secure connection between the closing element and the sealing seat is ensured over an enlarged area.
• the closing element is made of spring steel.
• the closing element has a thickness in the range of 0.1 to 0.5 mm, depending on the functional requirement also stronger.
• Spring steel is flexible and has sufficient hardness, due to these properties, spring steel is suitable for use as a closing element in a return valve.
• this is preferably an injection molded part, in particular made of plastic.
• a secure and easy to produce connection between the closing element and the sealing seat is given, if preferably the fixing end of the closing element is encapsulated with the material of the sealing seat.
• this allows the resilient function of the closing element, since only the fixing, ie only the fixing of the closing element are completely or partially molded with the material of the sealing seat in a single or multi-stage injection molding process.
• the closing element is inserted and sprayed the sealing seat in only one operation, the fixing arms are completely or alternatively encapsulated only at their ends with the material of the seal.
• the first step is to protrude the sealing seat, followed by the insertion of the closing element, which is finally completely or partially encapsulated in the area of its fixing.
• the closing element After fixing the closing element on the sealing seat
• the bending beam and the shutter plate can pivot.
• the resilient and non-resilient components of the non-return valve which are made of different materials, are permanently connected to one another.
• a hydraulic valve in particular a control valve for controlling pressure medium flows of a camshaft adjuster, comprising a hollow executed valve housing with at least one inlet port and at least one drain port, wherein in the valve housing a check valve according to one of the preceding embodiments is installed.
• Fig. 1 is an axial sectional view through a control valve
• FIG. 3 is a plan view of a check valve
• Fig. 4 is a section through the plane I of FIG. 3, and
• FIG. 5 shows a section through the plane II of FIG .. 3
• a control valve 2 which is designed as a central valve and is used for use in a central bore of a rotor of a hydraulic camshaft adjuster not shown here.
• the control valve 2 comprises a hollow cylindrical valve housing 4 with an inlet port P, two working ports A, B for the opposing pressure medium chambers in the rotor of the camshaft adjuster and a drain port T.
• a control piston 6 is axially guided, wherein Depending on its position of the inlet port P with one of the working ports A, B is fluidically connected, while the other working port A, B is connected to the drain port T.
• a hydraulic pilot-operated check valve 8 which releases a pressure medium line 7 in the inlet direction is arranged.
• the check valve 8 consists of a closing element 10 and a sealing seat 12 and a filter 30, which are shown in the exploded view in FIG. 2 as separate components. In the assembled form of the check valve 8, however, these are firmly and in particular permanently connected to each other and thus form a prefabricated assembly or assembly 13, which is shown in Figures 3 to 5.
• the closure member 10 is in this embodiment of spring steel, although the use of other spring materials is possible.
• the closing element 10 comprises three functional areas: A closure plate 14 for closing an opening 16 in the sealing seat 12, a resilient bending web 18 and a fixing end 20, which in this embodiment comprises two fixing arms 20a, 20b.
• the shape of the fixing arms 20a, 20b follows the contour of the valve seat 12, so that the fixing end 20 in the shown Embodiment arcuate. In a plan view, the closing element 10 thus has approximately the shape of an anchor.
• the sealing seat 12 is made of plastic and has a bearing surface 22 on which the closing element rests in a closed position of the check valve 8 10 and thereby covers the opening 16.
• the shape of the closure plate 14 is adapted to the shape of the opening 16.
• the sealing seat 12 is approximately disc-shaped and has a thickness of a few centimeters, depending on the requirement or application.
• the sealing seat 12 is an injection molded part, in the manufacture of which the fixing arms 20a, 20b are encapsulated with the material of the sealing seat 12, so that the fixing arms 20a, 20b are completely covered by an axial collar 24 are enclosed, which extends arcuately in the edge region of the support surface 22.
• a filter 30 for filtering the pressure medium is arranged on the side opposite the closure plate 14 side of the sealing seat 12.
• a pressure medium such as oil
• a pressure medium which is introduced through the working port P in the control valve 2 enters the pressure medium line 7 and passes through the check valve 8 by the closure plate 14 lifts under the pressure force of the pressure medium, so that the opening 16 is opened and the Pressure fluid in the direction of the working ports A, B can flow.
• Opening of the check valve 8 is possible thanks to the elastic suspension of the bending web 18 combined with the fixed attachment of the fixing arms 20a, 20b on the sealing seat 12.
• the spring force to be overcome depends on the material and thickness of the closing element 10.
• the check valve 8 is characterized by its ease of installation at the place of use, since its two components form the closing element 10 and the sealing seat 12 by encapsulating the fixing arms 20a, 20b a structural unit 13, which is integrated as such in the control valve 2. It thus eliminates a complex installation of the thin closing element 10 in the control valve. 2

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Check Valves (AREA)
• Lift Valve (AREA)
• Valve Device For Special Equipments (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=44582886

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (25)

Citations (7)

Family Cites Families (12)

• 2010
  • 2010-07-26 DE DE201010032251 patent/DE102010032251A1/de active Pending
• 2011
  • 2011-05-23 WO PCT/EP2011/058350 patent/WO2012013386A1/de active Application Filing
  • 2011-05-23 CN CN2011800366671A patent/CN103038554A/zh active Pending
  • 2011-05-23 BR BR112012032142A patent/BR112012032142A2/pt not_active Application Discontinuation
  • 2011-05-23 US US13/811,784 patent/US9046181B2/en active Active

Patent Citations (7)

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